Concept explainers
After three hours , find the distance between the planes.
Answer to Problem 1P
About 1345.6 km
Explanation of Solution
Given:
Two planes leave an airport at the same time, one flying at 300 km/h and the other at 420 km/h.The angle between their flight paths is
Formula Used:
Law of Cosine:
Calculation:
One plane has speed 300 km/h , so , the distance it has travelled in 3 hours = 300(3) = 900 km
Second plane has speed 420 km/h , so , the distance it has travelled in 3 hours = 420(3) = 1260 km
Represent the situation :
Use Law of Cosine:
So, the distance between the planes after 3 hours is about 1345.6 km.
Chapter 12 Solutions
Algebra and Trigonometry: Structure and Method, Book 2
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